【正文】 t elevated on the Outer Continental Shelf must have a fog horn that will sound ______. A. a 2second blast every 20 seconds B. a 4second blast every 20 seconds C. an 8second blast every 30 seconds D. a 10second blast every 30 seconds KEY: A [431]A large basin cut into the shore， closed off by a caisson， and used for dry docking of ships is known as a ______. A. slipway B. graving dock C. ground warp D. caisson dock KEY: B [432]A large metallic device， mounted directly in the piping (usually located at the dock near the point where the vapor hose is attached)， designed to prevent the passage of a rapidly moving flame through the piping is called a ______. A. flame arrestor B. flame screen C. detonation arrestor D. detonation blocker 。s stability underway by ______. A. increasing the righting moment B. decreasing the vessel39。S TWO KINDS OF CERTIFICATES HAVE EXPIRED. ONE IS DERATING CERTIFICATE AND THE OTHER IS SAFETY EQUIPMENT CERITFICATE. According to this telex， ______. A. two certificates have expired B. two certificates will expire C. one of the two certificates have expired D. one of the two certificates will expire KEY: A [403]______ any case or suspected case of quarantinable disease， or any case of eruptive disease or any death be discovered， the local quarantine officer must be notified immediately． A. If B. Shall C. Should D. Whether KEY: C [404]______ any person died on board during the voyage otherwise than as a result of accident？ A. Have B. Has C. Has there been D. Are there KEY: B [405]______ any sick person on board now apart from the abovementioned cases？ A. Have B. Has C. Is there D. Are there KEY: C [406]______ day， pilot flag should be displayed from main mast． A. From B. By C. on D. With KEY: B [407]______ during the voyage any case or suspected case of plague， cholera， yellow fever，smallpox， typhus or relapsing fever？ A. Has there been B. Have there been C. Has there D. Have there KEY: A [408]A decrease in barometric pressure is associated with all of the following except ______. A. rising warm air B. proximity to a low pressure area C. inward spiraling circulation D. clear dry weather KEY: D [409]A device fitted over the discharge opening on a relief valve consisting of one or two woven wire fabrics is called a flame ______. A. stopper B. screen C. filter D. restrictor KEY: B [410]A disadvantage of using chain lashing on heavy vehicles aboard RoRo vessels is that it is ______. A. heavy B. easily damaged C. affected by temperature D. costly relative to the strength ratio KEY: A [411]A Doppler speed log indicates speed through the water ______. A. at all times B. in the bottom return mode C. in the volume reverberation mode D. only when there is no current KEY: C [412]A drawbridge may use visual signals to acknowledge a vessel39。s Handbook C. Catalogue D. Sailing Directions KEY: A [309]Contour elevations on this chart refer to heights in feet above mean ______. A. lower low water B. high water C. low water D. sea level KEY: D [310]Charts are subject to frequent correction according to ______. A. Notices to Mariners B. Mariner39。t he KEY: D [182]The pilot motor launches are ______ blue， with the PILOT in white． A. furnished B. painted C. prepared D. written KEY: B [183]The pilot said he ______ our vessel directly to the berth． A. will take B. took C. is taking D. would take KEY: D [184]The pilot station ______ close west of the end of the breakwater． A. is stayed B. is situated C. is placed D. is located KEY: B [185]The pilot station is {situated close} W of the breakwater． A. to B. near C. distant D. on KEY: B [186]The radiotelephone required by the Vessel BridgetoBridge Radiotelephone Act is for the exclusive use of ______. A. the Master or person in charge of the vessel B. a person designated by the Master C. a person on board to pilot the vessel D. All of the above KEY: D [187]The single letter G， sent by an icebreaker to an assisted vessel， means ______. A. I require a pilot B. Longitude follows C. I am going ahead。s actions， or intentions， he should ______. A. notify the Captain as soon as possible B. seek clarification from the pilot C. take action by his own judgment D. cease the duty of pilot39。s Guide B. Tidal Current Tables C. Nautical Almanac D. Tide Tables KEY: B [157]ETA／ PILOT REVERTING means ______ ． A. ETA pilot station has been given． B. ETA pilot station will be given afterwards． C. ETA pilot station was not given． D. ETA pilot station is given KEY: B [158]For full information regarding the current circulation of the Indian Ocean， ______ Sailing Direction， Current Atlas， etc． A. watch B. look for C. see D. regard KEY: C [159]From ______ the mariner can know the data of tide． A. the Sea Pilot B. the Cargo Plan C. the Tide Table D. the Port List KEY: C [160]From ______ the mariner can understand the data of tide． A. cargo plan B. tide table C. port list D. sea pilot KEY: B [161]Gangway ______ with pilot ladder on my starboard side． A. being rigged bined B. is rigged bining C. rigs bining D. is rigged bined KEY: B [162]If the officer on watch is in any doubt as to the pilot39。t it C. is he D. isn39。s engine， care must be taken that the pilot ______. A. does not break the towline B. does not get too much way on the vessel C. keeps a steady course so the towline will remain tight D. turns the ship